Improvement in lock-hinges



.B.'LENT. Look-Hinge.

No. 204,984. Patented June18, 1878.

INVENTOR: 961W.

WITNESSES ATTORNEYS.

".PETERS. PHOTQLITHOGRJPMER, WASHINGTON. C.

UNITED STATE-s" PATENT O FICE BENSON LENT, or rnnxsx nn, NEW YORK.

IMPROVEMENT lN LOCK-HIVNGES.

Specification forming part of Letters Patent No. 204.984 dated June 18, 1878; application filed I May 24, 1878. I

To all whom itmay concern:

Be it known that I, BENSON LENT, of Peekskill, in the county of Westchester and State of New York, have invented a new and 'Improved Blind-Hinge, of which the following is a specification Figure 1 represents a top view of my improved blind-hinge as adapted for use in a brick house, and in the position it has when the blind is closed. Fig. 2 is a vertical section of the same, taken on the line 00 :rof Fig. 1. Fig. 3 is a vertical section of the same, taken on the line y y of Fig. 1. Fig. 4 is a top view of a modification of the same adapted for use on a frame house. Fig. 5 is a vertical section of the same, taken on the line z z of Fig. 4.. Fig. 6 is a detail perspective view of the springcase. Fig. 7 is a detail perspective view of the spring-slide.

Similar letters of reference indicate correspondin g parts.

The object of my invention is to furnish a cheap and strong reversible blind-him ge, which will be locked automatically when the blind is closed or fully open, and will retain the blind, also, in other positions, and which will prevent the removal of the blind from its hinge-pin, except when the blind is in the above-named position of fully closed or fully open.

The hinge is formed of two brackets, .of which one is secured to the wall and the other to the blind-sash, the latter bracket having an angular head, by which it is fitted to swing horizontally upon a vertical pin formed on the former.

The stationary bracket has a box or case inclosing a spring, which latter acts upon a slide having a stop thus pressed against the angular circumference of the pivoted head of the swinging bracket, said stop entering a corresponding notch in the said circumference tolock orretain theswingingbracket and blind in position when fully opened or closed. When in these positions the swinging bracket may be lifted off the pivot. In all other positions it is prevented from being lifted oif by a projection on the spring-case or on the pivot, which laps, respectively, the outer or the inner circumference of the head of the swing- 'ng bracket, as will be hereinafter described.

and having cast upon its outer end the vertical pin or pivot O. y

The swinging bracket consists of the ver- 7 tical plate F, attachable to the blind-sash, the curved horizontal arm G (with strengthening feathers or ribs g) projecting from the plate F,

and the head H on theendof the arm Gr, all cast'together in one piece.

The head H is flat and has a hole through its center, adapting it to be pivoted upon the pin 0, and its circumference is angular, being composed of cords h drawn in the periphery of a circle, having for its center the center of the pivot-hole.

In each of the opposite ends of the diameter, which, extended, would form right angles with the extended plane of the plate F, the circumference of the head H is cut away to form a notch or recess, f, with flat bottom, and whose two sides form obtuse angles with the bottom.

D is a platelwith vertical flanges d, which plate, when attached with the flanges against the plate B, and with one of its open ends against the plate A, forms a case or box for inclosing a rubber or other spring, I. The open end of the case D, opposite to the pin 0, is closed by the sliding block E, which is held firmly pressed against the edge oft-hehead H by the expansion of the spring I.

The block E (in a blind-hinge for a brick house, as in Figs. 1, 2, and 3) is provided with an upper and a lower guide-cleat, e, by which it slides in grooves in the plates D and B, said cleats at the same time serving as stops against the front ends of the grooves to retain the slide E in the case D. The end of the block E in contact with the head H has a stop, 6 formed upon it.

In a blind-hinge for a frame house, as in Figs. 4, 5, 6, and 7, where the pin 0 is too near the plate A to allow of proper room for the spring I between them, the case D is placed below the plate B, and the block E is sliding in a slotin the plateB beneath thepinO, and has a downwardly-projecting flange, e, in front, acted on by the spring I and the stop 6 projecting upward at the rear end of the spring overcome.

The block E in this caseis supported underneath by a stud, d, cast on the inside of the plate D.

The stop a of the spring-slide E is of suitable shape to fit and fill the notches f, and is pressed by the spring I against the circumference of the head H with force enough to retain the blind by friction, under ordinary circumstances, in any position in which the flat surface of the stop 6 rests against one or the other of the cords h and when lodged in one of the notches f the stop (2 will lock the blind in position-that is to say, retain it with creased friction, requiring an extra exertion to When in this position the blind or the pivoted bracket may be lifted off the pin'O. In all other positions the projection a, (formed on the forward end of the case D in a blind-hinge for a brick house,), which is not projecting as far as the depth of the notch f, will lap oro-verreach the edge of thehead H, thus preventing the removal of the blind from the pin 0.

In a blind-hinge for a frame house, as in Figs. 4 and 5,. the projection c is formed on the pin 0 above the head H, and the latter 1 provided with notches coinciding with the projections on the pin 0 when the hinge is in pos'ition of closed or fully open.

As the swinging bracket is exactly alike on its upper and lower sides, it may be reversed and placed on the pin 0 in the dotted position marked R in Fig. 4, when it is desired to change the hinge from the left to the right side of the window.

The cords h and intermediate angles on the circumference of the head H between the notches f may be omitted asnot essential, and the circular curve maintained.

Having thus described my invention, I claim as new and desire to secure by Letters Patent The combination of the spring I and the follower or stop-block E, arranged upon the :plate B of the stationary bracket, with the swinging bracket provided with notches f in the circumference of the head H, substantially as and for the purpose set forth.

BENSON LENT. WVitnesses:

O. snnewicx, ALEX. F. Ronnnrrs. 

